Job 38:17

“Have the gates of death been opened unto thee? etc.] Meaning not by which death has entered into the world, and which have been the causes and occasion of it; as the sin of man, the appointment of God, and various providences, calamities and diseases; but by which men enter into the state of the dead. Men know not experimentally what death is, nor in what way they shall go out of the world, nor at what time, nor in what place; they know not what the state of the dead is, there is no correspondence between them and the living; they do not know either what they enjoy or endure, or who precisely and with certainty are in the separate abodes of bliss or misery; the gates of these dark and…”

“seen--The second clause heightens the thought in the first. Man during life does not even "see" the gates of the realm of the dead ("death," Job 10:21); much less are they "opened" to him. But those are "naked before God" (Job 26:6).”

“Have the gates of death been opened unto thee - That is, the gates of the world where death reigns; or the gates that lead to the abodes of the dead. The allusion here is to “Sheol,” or “Hades,” the dark abodes of the dead. This was supposed to be beneath the ground, and was entered by the grave, and was inclosed by gates and bars; see the notes at Job 10:21-22. The transition from the reference to the bottom of the sea to the regions of the dead was natural, and the mind is carried forward to a subject further beyond the ken of mortals than even the unfathomable depths of the ocean. The idea is, that God saw all that occurred in that dark world beneath us, where the dead were congregated,…”

“Death - Hast thou seen, or dost thou know the place and state of the dead; the depths and bowels of that earth in which the generality of dead men are buried. Death is a grand secret? We know not when or by what means we shall be brought to death: by what road we must go the way, whence we shall not return. We cannot describe what death is; how the knot is untied between soul and body, or how the spirit goes "To be we know not what, and live we know not how." With what dreadful curiosity does the soul launch out into an untried abyss? We have no correspondence with separate souls, nor any acquaintance with their state. It is an unknown, undiscovered region, to which they are removed. While…”

“the gates: Psa 9:13, Psa 107:18, Psa 116:3 the shadow: Job 3:5, Job 12:22; Psa 23:4, Psa 107:10, Psa 107:14; Amo 5:8; Mat 4:16 Job 38:18”